ISO 17442-2:2020

INTERNATIONAL ISO
STANDARD 17442-2
First edition
2020-08
Financial services — Legal entity
identifier (LEI) —
Part 2:
Application in digital certificates
Services financiers — Schéma d'identifiant d'entité légale (IEL) —
Partie 2: Utilisation dans les certificats numériques
Reference number
©
ISO 2020
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Structure of the X.509 public key certificate with embedded LEI .1
Annex A (informative) Example digital certificate with embedded LEI and role .3
Annex B (informative) Mutual benefits of combining LEIs and digital certificates for
identity management . 4
Bibliography . 5
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 68, Financial services, Subcommittee SC
8, Reference data for financial services.
This first edition of ISO 17442-2, along with ISO 17442-1, cancels and replaces ISO 17442:2019, which
has been technically revised.
A list of all parts in the ISO 17442 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

Introduction
Legal entity identification is an integrated and necessary component of financial transactions. Entering
into business relationships requires “know your customer” processes to be initiated and maintained for
the duration of these relationships and any longer-term data retention requirements to be addressed.
Parties involved in financial transactions need to be identified in the records of these transactions.
Then the risk for each party and the resulting concentration risk need to be measured. All of this needs
to be achieved while the support for straight through processing (STP) is maintained.
Both legal entity identifiers (LEIs) and digital certificates are established tools for identity management.
These tools can be of even greater benefit to users if they are combined so that they complement each
other, providing a new solution to standardized digital identity. Annex B outlines the mutual benefits of
this combination.
It is possible, for example, to display the LEI in a web browser address bar from the digital certificate or
retrieve information from the LEI data record using an application programming interface (API).
Furthermore, the public key certificate can be linked to the LEI and its associated data record.
INTERNATIONAL STANDARD ISO 17442-2:2020(E)
Financial services — Legal entity identifier (LEI) —
Part 2:
Application in digital certificates
1 Scope
This document specifies a standardised way of embedding the legal entity identifier (LEI) code, as
represented in ISO 17442-1, in digital certificates, represented by the International Telecommunications
Union (ITU) Recommendation X.509 and its ISO equivalent standard, ISO/IEC 9594-8.
This document specifies the structure of a public key certificate conforming with ISO/IEC 9594-8 in
which the LEI is embedded.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http
...